Recognition of concurrent control chart patterns using wavelet transform decomposition and multiclass support vector machines

  • Authors:
  • Shichang Du;Delin Huang;Jun Lv

  • Affiliations:
  • Department of Industrial Engineering and Logistics Management, School of Mechanical Engineering, Shanghai Jiaotong University, 800 Dongchuan Road, Shanghai 200240, PR China;Department of Industrial Engineering and Logistics Management, School of Mechanical Engineering, Shanghai Jiaotong University, 800 Dongchuan Road, Shanghai 200240, PR China;School of Business, East China Normal University, Shanghai 200241, PR China

  • Venue:
  • Computers and Industrial Engineering
  • Year:
  • 2013

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Abstract

Statistical process control charts have been widely utilized for monitoring process variation in many applications. Nonrandom patterns exhibited by control charts imply certain potential assignable causes that may deteriorate the process performance. Though some effective approaches to recognition of control chart patterns (CCPs) have been developed, most of them only focus on recognition and analysis of single patterns. A hybrid approach by integrating wavelet transform and improved particle swarm optimization-based support vector machine (P-SVM) for on-line recognition of concurrent CCPs is developed in this paper. A statistical correlation coefficient is used to determine whether the input pattern is a single or concurrent CCP. Based on wavelet transform, a raw concurrent pattern signal is decomposed into two basic pattern signals, which can be recognized by multiclass SVMs. The performance of the hybrid approach is evaluated by simulation experiments, and numerical and graphical results are provided to demonstrate that the proposed approach can perform effectively and efficiently in on-line CCP recognition task.